Hi Romullus, I uploaded at 2640 by 1440 - I guess it's taking a little while longer than usual for youtube to process it.
Best, Tom
YouTube state:
When you upload a video, it will initially be processed in low resolution. This helps the video to upload faster. Once your upload has been completed, your video will be available to stream in low resolution, usually 360p, on a wide variety of devices.
Higher resolutions, such as 4K or 1080p, can take more time to process. While this happens, your video may appear to be missing high-quality options, such as 4K or 1080p, for several hours. Once high-resolution processing is finished, higher resolutions will be available on your video.